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Finance Bill

I rise to support my hon. Friend the Member for Putney (Justine Greening). Her amendment makes a lot of sense, and I hope that the Minister will simply concede that. I am sure that the Government intend the tax exemption to be available only on the first sale-and-purchase transaction. The drafting in my hon. Friend's amendment would ensure that rather more accurately than the drafting in the Bill, so it would make sense to accept it. Like the hon. Member for Wolverhampton, South-West (Rob Marris), I wish to concentrate more on amendment No. 20 and what constitutes a zero-carbon home. I approach the issue from the proposition that it is better to try to change people's conduct using tax incentives than through tax impositions or compulsion. The principle in the amendment is therefore welcome. It is right that the Government should try to address emissions related to the home environment as well as transport emissions. We well know why that is important: many more of the typical family's emissions come from the family home. The problem is a difficult one, but it can be addressed using a series of incentives and proposals, of which this would be just one. I understand my hon. Friend the Member for Putney's worry that the measure will have a small impact. Part of the reason it will have a small impact is to do with the definition, which lacks clarity about what is a zero-carbon home. There might be a feeling out there in the marketplace that zero-carbon homes are unachievable, and that we should move our targets to what might better be called low-carbon homes as technology develops and the marketplace responds. That is what we do with motor vehicle manufacturing, the regulation of which is tightened progressively over the years, so that each generation of cars is successively better. As a result, exhausts have been cleaned up, and there have been changes regarding the production of fuel to give a certain level of performance. We could have a similar trajectory with housing and the improved performance of our homes, preferably through an incentive scheme. The hon. Member for Wolverhampton, South-West rightly said that the zero-carbon home of the Government's imaginings is not truly zero-carbon because the construction process will entail a certain level of carbon dioxide emission. He could add to his list the emissions of vehicles used on a site to dig the ground and move the earth, as well as any pile-driving and concrete mixing required to provide the foundations and a stable platform on which to build. Another aspect of all building processes that causes, perhaps, even more carbon emissions is the manufacture of building materials. Most of the building materials going into a typical British house have been produced using energy-intensive processes. The cement industry is a big energy user, as is the brick industry. That consideration needs to be fashioned into a policy. Although it will be good news for those who wish to cut carbon emissions if homes can be constructed that emit few or no carbon emissions, it will not be such good news if the building materials used to achieve that degree of insulation and that carbon-free standard were produced using energy-intensive methods or if they had to be transported quite far. Such homes would take many years to break even on the carbon account. These issues are difficult. Carbon accounting is a rudimentary science at the moment, and all too many people considering it think that there are silver bullets and easy answers. They think, for example, that stopping people driving would make the problem go away, but it would not. The issue is more complicated than that. All sorts of processes and circumstances involve carbon dioxide emissions, and a sophisticated carbon account is needed before sensible policy conclusions can be reached. I hope that the Minister will produce rather more sophisticated research—perhaps not today but in the months ahead, as this policy develops—so that we can have a better idea of what the true carbon account would be on a so-called zero-carbon home. I hope that the Minister will be able to provide a little more definition today, as my hon. Friend the Member for Putney requested. If the policy is to have any chance of working, the wider world, interested in building new homes, needs a clearer idea of what is required, and we need a clearer idea of whether it is achievable. I would regard as a failure a policy under which only 10 homes qualified in more than half a year, and, if I were a Minister, I would regard it as my important duty to tweak and change it until I had a decent number of homes coming forward, so that I could claim that the policy was some kind of success. I put it to the Minister either that it is a problem of persuading the market that what she has in mind can be done—the Government are meant to be good at putting out messages through the media—or that perhaps more work needs to be done on the sort of home that is envisaged, working in conjunction with the industry, so that we can roll out a policy for the hundreds and thousands rather than the one and twos as we seem to have at the moment. I think that a stamp duty tax break is a very attractive tax break, as stamp duty is very high on the more expensive houses and still a lot of money on the relatively cheap houses because house prices have increased so much. We would expect to have something for the expenditure of tax revenue forgone; we do not seem to be getting it at the moment, so I hope that the Minister will use amendment No. 20 as an opportunity to clarify and improve the definition so that it delivers on the carbon front, taking into account the production of carbon in building the house as well as in subsequently living in it, as well as delivering the number of homes needed to fulfil the targets.